diff --git a/jedi/evaluate/__init__.py b/jedi/evaluate/__init__.py
index dcdb8d6e..d2edc955 100644
--- a/jedi/evaluate/__init__.py
+++ b/jedi/evaluate/__init__.py
@@ -125,15 +125,21 @@ class Evaluator(object):
         result = self.eval_expression_list(expression_list)
 
         ass_details = stmt.assignment_details
-        if ass_details and ass_details[0][1] != '=' and not isinstance(stmt,
-er.InstanceElement):  # TODO don't check for this.
-            #print('LEFT', ass_details, stmt, stmt.parent)
+        if ass_details and ass_details[0][1] != '=' and not isinstance(stmt, er.InstanceElement):  # TODO don't check for this.
             expr_list, operator = ass_details[0]
+            # `=` is always the last character in aug assignments -> -1
+            operator = operator[:-1]
             name = str(expr_list[0].name)
-            start_pos = stmt.start_pos[0] - 1, stmt.start_pos[1] + 30000
-            left_result = self.find_types(stmt.parent, name, start_pos)
-            # `=` is always the last character in aug assignments
-            result = precedence.calculate(left_result, operator[:-1], result)
+            left = self.find_types(stmt.parent, name, stmt.start_pos)
+            if isinstance(stmt.parent, pr.ForFlow):
+                # iterate through result and add the values, that's possible
+                # only in for loops without clutter, because they are
+                # predictable.
+                for r in result:
+                    left = precedence.calculate(left, operator, [r])
+                result = left
+            else:
+                result = precedence.calculate(left, operator, result)
         elif len(stmt.get_set_vars()) > 1 and seek_name and ass_details:
             # Assignment checking is only important if the statement defines
             # multiple variables.
diff --git a/jedi/evaluate/iterable.py b/jedi/evaluate/iterable.py
index c2c58e94..a26c59e6 100644
--- a/jedi/evaluate/iterable.py
+++ b/jedi/evaluate/iterable.py
@@ -94,7 +94,7 @@ class Array(use_metaclass(CachedMetaClass, pr.Base)):
 
         result = list(self._follow_values(self._array.values))
         result += check_array_additions(self._evaluator, self)
-        return set(result)
+        return result
 
     def get_exact_index_types(self, mixed_index):
         """ Here the index is an int/str. Raises IndexError/KeyError """
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index db15cad0..866d0f2e 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -335,7 +335,7 @@ class Function(use_metaclass(CachedMetaClass, pr.IsScope)):
         if not self.is_decorated:
             for dec in reversed(self.base_func.decorators):
                 debug.dbg('decorator: %s %s', dec, f)
-                dec_results = set(self._evaluator.eval_statement(dec))
+                dec_results = self._evaluator.eval_statement(dec)
                 if not len(dec_results):
                     debug.warning('decorator not found: %s on %s', dec, self.base_func)
                     return None
diff --git a/test/completion/operators.py b/test/completion/operators.py
index 15782bd0..b3eee265 100644
--- a/test/completion/operators.py
+++ b/test/completion/operators.py
@@ -34,24 +34,10 @@ def calculate(number):
 # strings
 # -----------------
 
-class FooBar(object):
-    muahaha = 3.0
-    raboof = 'fourtytwo'
+x = 'upp' + 'e'
 
-x = 'mua' + 'ha'
-
-#? float()
-getattr(FooBar, x + 'ha')
-
-
-# github #24
-target = u''
-for char in reversed(['f', 'o', 'o', 'b', 'a', 'r']):
-    target += char
-
-answer = getattr(FooBar, target)
-##? str()
-answer
+#? str.upper
+getattr(str, x + 'r')
 
 # -----------------
 # assignments
@@ -71,3 +57,26 @@ i -= 3
 i += 1
 #? int()
 x[i]
+
+# -----------------
+# for flow assignments
+# -----------------
+
+class FooBar(object):
+    fuu = 0.1
+    raboof = 'fourtytwo'
+
+# targets should be working
+target = u''
+for char in ['f', 'u', 'u']:
+    target += char
+#? float()
+getattr(FooBar, target)
+
+# github #24
+target = u''
+for char in reversed(['f', 'o', 'o', 'b', 'a', 'r']):
+    target += char
+
+#? str()
+getattr(FooBar, target)